The National Park of Ainos is located on the island of Kefalonia and is the smallest national park in Greece, yet one of immense ecological importance. Established in 1962, its primary purpose was to protect the mountain's unique ecosystem, which is dominated by the Kefalonian Fir (Abies cephalonica). This rare species of fir has a very dark green color, which historically led Venetian sailors to name the mountain "Monte Nero" (Black Mountain).
The highest peak of Mount Ainos is Megas Soros, reaching an altitude of 1,628 meters, offering panoramic views of the surrounding Ionian islands and the western coast of the Peloponnese. Beyond its rich plant life, the park serves as a sanctuary for diverse wildlife, most famously the wild horses of Ainos (belonging to the Pindos breed) that live in a semi-wild state on the southeastern slopes.
The national park is an ideal destination for nature lovers and hikers, featuring a well-marked network of trails suitable for various difficulty levels. Furthermore, due to the minimal light pollution and exceptionally clear atmosphere, Ainos has been designated as Greece's first International Dark Sky Park, making it a premier location for stargazing.